My brother in law is illegally using our permanent address.

By brother in law U mean,UR sister's husband.U should  have restricted his activities in the initial stages itself fully knowing his past.Now it may lead to lot of complications and misunderstandings within the family.Legally UR query has no substance,hence settle the matter amicably.

You tell your brother-in-law to stop using your address in future and take steps to change the address in all his earlier documents.  Perhaps he may not agree.  Then take following steps:

1. Give a paper publication saying that he is playing fraud by giving your address as false address and any omission or commission arises out of this, you and your family will not be responsible.

2.  After publication, send the letter enclosing that advertisement to all those authorities to bank, voter ID department, transport authority where his driving licence and vehicle license were registered by speed post with ack. due.  Keep the copy of the receipt of those letters as proof.

3.  Also serve legal notice to him that not to use your residential address in future.

I just sugggested the above measure taking into consideration his sister.But if they feel that the behavioiur of their brother in law is irksome they can go for a legal solution.

Yes he is my husband's cousin. A total defaulter. 

learned adv chandrasekhar had rightly adviced you.do that ASAP

So he is not a direct member of UR matrimonial home.Then get rid of him as suggested by Adv.Chandrasekhar.

UMA,

U have another query posted yesterday"